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Authors
Viglund, Kerstin https://orcid.org/0000-0001-6881-8122
Olofsson, Birgitta
Lundman, Berit
Norberg, Astrid
Lövheim, Hugo
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Funding
Funding for this research was provided by:
European Regional Development Fund (Dnr 304-9348-2008)
Svenska Forskningsrådet Formas (K2104-99X-22610-01-6)
Umea University
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Article History
Accepted: 13 July 2021
First Online: 18 October 2021
Declarations
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: The authors declare that they have no conflict of interest.
: The Regional Ethics Review Board in Umeå (Dnr 05/084 & 2016/367-32) approved this study. In Finland, ethical approval is not needed for anonymous population based postal surveys (Medical Research Act 488/1999, English translation available at ). Guidelines of the Finnish National Advisory Board on Research Ethics () were followed.
: A letter enclosed to the questionnaire described the voluntary participation and confidentiality of data, and a questionnaire filled in and sent back was considered as consent to participate.
: All authors have approved the submitted manuscript.
